Pedal crank and chain wheel assembly for bicycles

Details Pedal crank and chain wheel assembly for bicycles Pedal crank and chain wheel assembly for bicycles

B - Operations, Transporting

62

M

74/35

B62M 9/00 (2006.01) B62L 5/00 (2006.01) B62M 9/10 (2006.01)

Patent

CA 1206020

ABSTRACT A chainwheel is supported on a pedal crank in a bicycle, lost motion being provided, in order to prevent lock up when using a pedal crankshaft operated brake, by support- ing the inner periphery and one side of the wheel on a chain wheel carrier, and taking up play on the other side of the wheel by using a nut to force a resilient washer into a cone. The nut may be an inner race of a crankshaft bearing if the pedal crank is integral with a pedal crank- shaft. A spring connecting the wheel and the crank is made progressive by causing it to wrap onto a cylindrical sur- face concentric with the crankshaft axis.

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